++++ 1 . SOCIAL SECURITY FOR MIGRANT WORKERS - OLD-AGE AND LIFE INSURANCE - INSURANCE PERIODS - AGGREGATION - APPORTIONMENT - BENEFITS - TOTAL AMOUNT LESS THAN AMOUNT OF BENEFIT TO WHICH INSURED ENTITLED UNDER LEGISLATION OF ONE MEMBER STATE - ARTICLE 28 ( 3 ) OF REGULATION NO 3 - INCOMPATIBILITY WITH ARTICLE 51 OF EEC TREATY - INVALIDITY 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - OLD-AGE AND LIFE INSURANCE - RIGHT TO PENSION EXISTING WITHOUT RECOURSE TO INSURANCE PERIODS IN ANOTHER MEMBER STATE - ARTICLE 13 ( 1 ) ( B ) AND ( 5 ) OF REGULATION NO 4 - INAPPLICABILITY